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Toshiba Introduces 500GB 2.5-inch Hard Disk Drive with Quiet Acoustics and Enhanced Durability

Toshiba Corporation today announced a new half-terabyte HDD, the flagship model in a series of 5,400 RPM SATA 3.0 Gbps 2.5-inch HDDs.

Available in capacities from 500GB to 120GB, the new series of quiet and durable drives is targeted for integration into notebook PCs, sub-notebooks, small form factor and energy star PCs, game consoles, external storage devices and consumer electronics products.

Advanced servo techniques combined with mechanical design changes minimize noise emanating from the drives, making them very quiet during operation. A further plus is that power consumption during data seek and read/write operation has been reduced by 0.5W, compared to Toshiba's current top-of-the-line 400GB HDD, to 1.7W and 1.4W, respectively.

In addition, optimization of mechanics and servo design boosts the durability of the series, to realize operating shock tolerances matching the highest levels available on the market today. To further protect user data against potentially hazardous external events, free-fall sensor (FFS) options are available in all models in the new series.

Toshiba's new drive series will begin shipping in production volumes to OEMs and distributors in December 2008 and will be exhibited at CES 2009 in January.


  MK5055GSX MK4055GSX MK3255GSX MK2555GSX MK1655GSX MK1255GSX
Capacity 500GB 400GB 320GB 250GB 160GB 120GB
Number of disks 2 1 1
Number of heads 4 2 1
Average seek time 12msec
Interface Serial ATA 2.6/ATA8
Interface speed 3.0Gbit/s
Rotational speed 5,400rpm
Buffer memory 8MB
Dimensions (W)69.85mm x (D)100.0mm x (H)9.5mm
Weight 102g(max.) 98g(max.)
Energy consumption efficiency 0.0012W/GB 0.0015W/GB 0.0019W/GB 0.0024W/GB 0.0038W/GB 0.0050W/GB
Power Consumption Seek 1.7W
Read/Write 1.4W
Acoustics Idle 25dB 19dB
Seek 25dB 20dB
Vibration resistance Operating 9.8m/s2 , 1G(5-500Hz)
Non-op. 49m/s2 , 5G(15-500Hz)
Shock resistance Operating 3,920m/s2 (400G,2msec)
Non-op. 8,820m/s2 (900G,1msec)

Other features:

  • Halogen-free. The new drives achieve chlorine and bromine concentrations below 900ppm for each substance, and an overall total below 1,500ppm, achieving the standard required for recognition as Toshiba environmentally conscious products (ECP).
  • Improved energy consumption efficiency. Compared to the 400GB model (MK4058GSX), the new 500GB HDD model (MK5055GSX) improves energy consumption efficiency, as defined under the Japanese legal standard, to 0.0012W/GB, a 20% improvement. Lower CO2 emissions during the product lifecycle. During their lifecycle, the new drives will release approximately 95g a year less CO2 than their benchmark models.
  • RoHS compatible. The new drives comply with the European Union's RoHS directive for eliminating use of six hazardous substances in electrical and electronic equipment.

Source: Toshiba Corporation

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